Stablecoins Explained: What They Are and What They Are Not
A stablecoin is a type of cryptocurrency designed to maintain a stable value relative to a reference asset, most commonly the US dollar, achieved through reserves of cash or cash-equivalents, other assets, or algorithmic mechanisms. Stablecoins are not risk-free or government-insured; some algorithmic stablecoins have historically lost their peg entirely, resulting in significant investor losses.
How stablecoins try to hold their peg
Fiat-collateralized stablecoins hold reserves of cash and cash-equivalent assets meant to back each token in circulation. Crypto-collateralized stablecoins use other cryptocurrencies as backing, typically over-collateralized to absorb volatility. Algorithmic stablecoins use supply-adjustment mechanisms without direct asset backing, a model that has proven the most fragile historically.
Why 'stable' doesn't mean 'risk-free'
Stablecoins carry counterparty risk (is the reserve actually there and adequately audited?), regulatory risk, and, for algorithmic designs, mechanism-failure risk. They are not FDIC-insured deposits, even though they're designed to behave similarly to holding dollars.
Where stablecoins fit in a real-return context
Because a well-collateralized stablecoin is designed to track the dollar, its real (inflation-adjusted) behavior is similar to holding cash — it does not appreciate, so it still loses purchasing power to inflation over time, the same dynamic covered in our piece on cash's hidden inflation cost.
Frequently asked questions
Are all stablecoins equally safe?
No. Different stablecoins use different backing mechanisms and have different levels of transparency and audit practices, resulting in meaningfully different risk profiles.
Can a stablecoin lose its peg permanently?
Yes, this has happened historically, particularly with algorithmic stablecoin designs that lacked sufficient collateral backing during periods of market stress.